The Thornton-Pickard Folding Ruby is a British-made folding plate camera, a body type produced in the late 19th and early 20th centuries when folding bellows designs were standard for serious amateur and professional photography. Thornton-Pickard, based in Altrincham, was known for plate cameras and focal-plane shutters, and the Folding Ruby sat within their range of wooden-bodied folding plate cameras.

Sales evidence for the Folding Ruby is extremely thin: a single recorded UK auction hammer result from December 2002 sold for £152, and no further data points are available to establish a current 2026 range or median. With only one historic sale at saleroom level, today's value is uncertain and condition-dependent, so prospective buyers asking what a Folding Ruby is worth or how much one sells for should treat that figure as a dated reference rather than a reliable guide to current price.